+static int radeon_cs_sync_rings(struct radeon_cs_parser *p)
+{
+ int i, r;
+
+ for (i = 0; i < RADEON_NUM_RINGS; ++i) {
+ /* no need to sync to our own or unused rings */
+ if (i == p->ring || !p->sync_to_ring[i] || !p->rdev->ring[i].ready)
+ continue;
+
+ if (!p->ib->fence->semaphore) {
+ r = radeon_semaphore_create(p->rdev, &p->ib->fence->semaphore);
+ if (r)
+ return r;
+ }
+
+ r = radeon_ring_lock(p->rdev, &p->rdev->ring[i], 3);
+ if (r)
+ return r;
+ radeon_semaphore_emit_signal(p->rdev, i, p->ib->fence->semaphore);
+ radeon_ring_unlock_commit(p->rdev, &p->rdev->ring[i]);
+
+ r = radeon_ring_lock(p->rdev, &p->rdev->ring[p->ring], 3);
+ if (r)
+ return r;
+ radeon_semaphore_emit_wait(p->rdev, p->ring, p->ib->fence->semaphore);
+ radeon_ring_unlock_commit(p->rdev, &p->rdev->ring[p->ring]);
+ }
+ return 0;
+}
+